package cn.webrx;


public class T4 {


    public static void main(String[] args) {
        //idea 写代码小技巧

        //单行注释ctrl + /


        int i = 3;
        System.out.println();
        System.out.println(i);
        System.out.println("helloworld");

        //Tab
        System.out.println();
        System.out.println(2 * 3);

        //idea ctrl + d 快速复制一行
        System.out.println(3 * 3);

        //idea alt + shift + up (down) 快速移动行代码
        System.out.println(3 * 3);

        //idea ctrl + x 删除选择的代码行


    }
}
